Upgrade conventional 1156/ 1157 bulb-style turn signals to LED-style. Custom Dynamics Flat Style LED Turn Signal Inserts. Single-color inserts are DOT approved, unless noted, and feature 40 LED gold-plated inserts.
these inserts were very easy to install, they are for the most part plug and play, if you need the load equalizer, as mine did, then that's the hardest part, installing that under the seat, total time for the six LED change out, about 40 minutes. I would highly recommend LED's over regular bulbs any day